400207936 has 28 divisors (see below), whose sum is σ = 795075372. Its totient is φ = 199874048.

The previous prime is 400207933. The next prime is 400207937. The reversal of 400207936 is 639702004.

It can be written as a sum of positive squares in 2 ways, for example, as 1806336 + 398401600 = 1344^2 + 19960^2 .

It is a junction number, because it is equal to n+sod(n) for n = 400207898 and 400207907.

It is not an unprimeable number, because it can be changed into a prime (400207933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61746 + ... + 67918.

It is an arithmetic number, because the mean of its divisors is an integer number (28395549).

Almost surely, 2^400207936 is an apocalyptic number.

It is an amenable number.

400207936 is a deficient number, since it is larger than the sum of its proper divisors (394867436).

400207936 is a wasteful number, since it uses less digits than its factorization.

400207936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7198 (or 7188 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 400207936 is about 20005.1977245915. The cubic root of 400207936 is about 736.9339514068.

It can be divided in two parts, 400 and 207936, that multiplied together give a square (83174400 = 9120²).

The spelling of 400207936 in words is "four hundred million, two hundred seven thousand, nine hundred thirty-six".